Its material is divided into structural elements of materials and sealing component materials, the principle of selection of resistant material performance, processing performance.
其选材分为结构元件材料和密封元件材料，选材的原则是材料的耐腐性能、加工性能等。
Its material is divided into structural elements of materials and sealing component materials, the principle of selection of resistant material performance, processing performance.
其选材分为结构元件材料和密封元件材料，选材的原则是材料的耐腐性能、加工性能等。
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